121252120 has 32 divisors (see below), whose sum is σ = 297619920. Its totient is φ = 44091520.

The previous prime is 121252099. The next prime is 121252147. The reversal of 121252120 is 21252121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121252094 and 121252103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137347 + ... + 138226.

Almost surely, 2^121252120 is an apocalyptic number.

121252120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121252120 is an abundant number, since it is smaller than the sum of its proper divisors (176367800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121252120 is a wasteful number, since it uses less digits than its factorization.

121252120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275595 (or 275591 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121252120 is about 11011.4540365930. The cubic root of 121252120 is about 494.9520342598.

Subtracting from 121252120 its reverse (21252121), we obtain a palindrome (99999999).

The spelling of 121252120 in words is "one hundred twenty-one million, two hundred fifty-two thousand, one hundred twenty".